initial commit for process scheduler

code/controllers/ProcessScheduler/test/testSlowProcess.dm

@@ -0,0 +1,28 @@
+/** 
+ * testSlowProcess
+ * This process is an example of a simple update loop process that is slow.
+ * The update loop here sleeps inside to provide an example, but if you had
+ * a computationally intensive loop process that is simply slow, you can use
+ * scheck() inside the loop to force it to yield periodically according to
+ * the sleep_interval var. By default, scheck will cause a loop to sleep every
+ * 2 ticks.
+ */
+ 
+/datum/controller/process/testSlowProcess/setup()
+	name = "Slow Process"
+	schedule_interval = 30 // every 3 seconds
+	
+/datum/controller/process/testSlowProcess/doWork()
+	// set background = 1 will cause loop constructs to sleep periodically,
+	// whenever the BYOND scheduler deems it productive to do so.
+	// This behavior is not always sufficient, nor is it always consistent.
+	// Rather than leaving it up to the BYOND scheduler, we can control it
+	// ourselves and leave nothing to the black box.
+	set background = 1
+	
+	for(var/i=1,i<30,i++)
+		// Just to pretend we're doing something here
+		sleep(rand(3, 5))
+	
+		// Forces this loop to yield(sleep) periodically.
+		scheck()